Browse Prior Art Database

Methods for Detecting Lost Books

IP.com Disclosure Number: IPCOM000106071D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Colson, JC: AUTHOR [+3]

Abstract

Disclosed is a computer program for tracking, detecting absent and ordering identical replacement books that have entered a shingle type conveyor in a perfect binder line.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Methods for Detecting Lost Books

      Disclosed is a computer program for tracking, detecting absent
and ordering identical replacement books that have entered a shingle
type conveyor in a perfect binder line.

      In a bindery line, books are tracked across sections of the
bindery that are physically separate.  It is observed that books
between the sections of the line may be lost or removed.  Books may
be lost in this area for a number of reasons, including quality,
trimmer failures and bad barcode scans.  When this happens it is
essential for the control system to become aware of this at some
point otherwise waiting indefi- nitely for books that will never
arrive.

      There are two types of tracking used for tracking books across
physically separated sections of the bindery line.  In the first
type, the books are all alike, and are referred to as generic books.
Here, since any book may be substituted for another, the books are
simply tracked via a FIFO queue.  When a book leaves the first
section, its book record is appended to the FIFO queue.  At this
time, an age is associated with the book.

      The age is derived from the cycles of the machine.  It is not a
good policy to use physical time as an age, as the machine is often
stopped for employee meal breaks and at other times for repairs.  It
is not wise to age books at this time.  In addition, since the two
sections of the line may run independently, choosing either section's
motion alone will result in poor decisions, since stopping either
section may result in books not moving through the system between the
two sections.  For this reason, the age is incremented by one
whenever both sections of the machine have moved forward one cycle.
This is approximated by waiting for one...